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accessing variables in subroutines using perl

0 votes
25 views

The following example doesn't compile:

use strict;
use warnings;

sub test {
 print $counter . "n";
}

my $counter = 0;
while($counter < 5) {
 test();
 $counter++;
}

It says "Global symbol "$counter" requires explicit package name ...". When I put the subroutine after the 'while' loop, it works just fine, so what's the problem?

posted Jun 26, 2013 by anonymous

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2 Answers

+1 vote

The subroutine does not see the lexical $counter variable because it was declared after its scope. For more information, see:
http://www.plover.com/FAQs/Namespaces.html

answer Jun 26, 2013 by anonymous
0 votes

You trying to print a variable $counter that was initialized outsider the scope of the subroutine.

answer Jun 26, 2013 by anonymous
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